Core-mold for hollow walls.



l R. T. WALES. CORE MOLD FOR HOLLOW WALLS.

APPLICATION FILED AUG.26. 1916. y 1,272,736. PatentedJu1y16,1918.

' facedk with a thin sheet. of' metal.

parts .are liised .ins'tead of the-woodenl boards ROWLAND. T. WALES, OF SEW'AREN, NEW JERSEY..

'CORE-MOLD `FOR HOLLOW WALLS.

Application. led August 26, 1916.

ments in Core-Molds for. Hollow Walls, of..

which the following is aspecification.`

This invention provides an improved core mold for forming-cavities vrin walls and other structures of concrete or similarly moldedY material: This application also includes certain features of core molds divided from my-app1ication No.l 802,867, lfiled Novemvber 25, 1913, Patent No. 1,211,901..

Amonggthe advantages ofthe` core mold or core disclosed herein: the followingfmayy be mentioned Y:-

l. When the surrounding'concrete is hard. this core may bek easily collapsedy and its. parts easily disengaged and-easily removed from the cavity formed byrit.

2. Itreqnires no upright-taper to `its form:

or parts andwill form a cavityhavinggwalls parallel to each other and-to the inclosing.

wall.

3. It will form a cavity. which is uniformly very narrow comparedv with its.

width and height'.

4. Itsparts are few, simple andy strong and are connected simply*y and securely.

5. Itsparts are operated simply and easily without binding pand .will stand rough use without getting out of-order.

Figures 1 and 2 showa kcore mold having prising a baokingof .corrugated sheet metal. These shown in Figs. 11and2. Fig. 3 is a horizontal-section onlines 3 ofFigs'. 4 and 5,-

and is broken away at the right of the view.

Fig.- 4 is a view of a lower corner looking. toward Figs. 3 and 5 at the arrows marked` 4. Fig. 5 is a vertical cross-sectiononlines marked 5in Figs. 3 and 4.

Fig. dissimilar te Fig., It isia hori-l Speeication of Letters Patent.

Patentedauiy 1e, i918.

Serial No. 117,008. f

zontal .cross-section and shows a design suitable for somework.

F igs. l and 2 show the parts cfa core` mold assembled as they are when the corey is set or surrounded with concrete. The side plates are shown'held apart by the spacers C. When the concrete is hard the core is collapsed and its parts removed from the cavity as follows: Remove the tie wire G. Cut the tie wires F with a long sharp bar. which can be inserted downward within the core. Drive or force the spacers C out of alinementwith each other, into positions illustrated. by the dotted lines in the left of Fig. 1. If the spacers C start to slide in the direction in which they are forced, instead.

of turning and becoming disengaged, this will be stopped when theyl reach the button heads of' E and thespacers can then be turned into positions similar to those shown bythe dotted lines. All parts of the corey will Ithenbe disengaged from each other and removable from the cavity formed in the concrete, Parts of the wires F willremain adhering to the concrete, but they are negligible.

In Figs. 1 and 2 each side plate comprises the wooden boards A, the extensions Dor D andthereinforcing straps Q or O, all bolted or screwed together as shown. The side .plates are shown assein'bledin a pair with their largest exterior upright faces (forming opposite exterior faces of the core), parallel to .each other. The narrow exterior uprightface of a side plate (shown at the left of D and adjoining B in Figs. 1 and 2. or at the right of D in Fig. l), eX- tends at an obtuse angle from the largest eX- terior upright face on the same side plate. This permits the side plate to be removed from the face .of the completed cavity and without binding. At the ends of the boards A there is a recess from the inner upright surfaceof the side plate becausev the inner surface ofthe extension D or D is disposedL nearer to the largest exterior. up# right. surface of the said plate. A spacer C` is shown disposed in this recess and the inner surface of Dor D is shown bearing against thethin bearing edge of C. This recess gives ample room for C and thus allows C to have suificient cross-section to bez strong. C is preferablyfin the form of an angle iron, as shown. Therecess permits the-sideplates to bedisposed closer'together than al distance equal to the width of the spacer measured perpendicularly to the faces of the side plates. This ,permits the side plates to have ample thickness for* strength and enables the core to form a sul stantially narrow cavity in a wall. This is desirablein residences `becaria-ie the walls.v p should Ybe as narrow as possible. lVide cores would both weaken the walls and make it diiicult to place reinforcement and concrete,

vbecause they would leave only a very narrow space between the cores and the mold platesV of 'thewall The substantially thin edge of the spacer C, against which D or D bears,"

extends in an upright position as shown when the core is set. By a substantially thin edge I mean one that is substantially angular or sharp, or similar tothe edge of the flange of an angle iron, or is not too 'f'blunt to cause an opposite edge or part of theV spacer to vmove appreciably farther from D. When the spacer is being turned on the said thin edge as an axis and intoY a position similar to that indicated by dotted llines V- near theV left of Fig. 1. Two spacers are shown disposed in aY pair with the bearing face of .one adjoining that of the other.

They have smallholes for receiving the tie' w1res`F:and`G,1as shown. G 1s removed from viewin Fig; 1;- The spacers in a pairk are shown'disposed so that the upright edges of' their adjoining bearing faces (the edges coinciding with the adjoining right angle corners of the spacers), are vdisposed in suby stantiallythe same plane with-the thin bear# ing edges adjoining D. This permits the pair of spacers'to be easily Vbuckled out of engagement with each other before-collapsing the core and without pressingl toward 40 each other=.suf'iciently tojbe bound when the spacers start to turn-on their `thinfedges1as axes. The right angle corners of the spacersl and therefore the coinciding edges "of their bearing faces are shown.disposednearerto 1 the center of thecore than 4is any other edge"Y of said bearing faces; This permitsD orD- to bearY against the spacers Cat aline closeto theendsof the platesfA` and ,thussubf jectsD or Dfto a minimum possible bending strain; 1 At the right of Figs. 1 land.'l 2 --isj shown Aa stop"Hgformed of any' suitable ma'` teri'al and. inserted` between frigidfpartjof thegicoreY and .the spacers 1G..l 'l it another aiexmetal plates' screwed toflA. yThey each" have agihole in whichzto insert some suitable ihook *orgmeans' Y for `lifting "the iside '-plates' fromV at 'zcompleted '.fcavity. The: angularY shapedf'splintsjB'l; are shown :cpveringf the spacesif'betweentheiuprightedges offgthelside plates and overlappingthem -to asubstantialj 6 5 .I distance ieaclr side fief; said spaceii'ljliesensi right side in Fig. il'.

tral part of the `inner. surface of a splint does not overlap the side plates. This cen- Y tral part constitutes a part of the inner surface vof thecore; vIt is'also at a slightlygreater `distance-from the center of the core than the adjacent edges of the side plates an angle and each extending in a plane atan obtuse angle to'the'largest exterior face Vof the side'plate adjoining the respectivemner face of the splint. 'Room is thus given for the side plates to be easily moved toward eachotherrwithout binding, when the cavity is Vcompleted and for their subsequent easy removal'fromrthe cavity. The ties F are shown holding the side plates, splints, and spacers together. They also prevent the adjacent wings of two Vspacers from separating, because each tie VF is shown bent into a small loop which passesin` a reverse direction through small holes in said wings. The holesthrough D or Dfor admitting the ties F- are so smallthat they do not :permit the leakage of anV appreciable amount of cement into the core." Y j In Figs, 4 and 5 is shown amoditication of side `plate comprising the parts D?, L andY M. lnstead of the boards A; shown in Figs.; 1 and 2, the parts L andM Vare used.` l M is a facing of thin V sheet metal. :Lisa backing of corrugated sheet metal. lD2r is an eX- tension similar-to D in Figs. 1" and 2,and is Y for the same object as D. D? is shown with slots cut in its` edge, which appears in its The metal between these slotsjis shown fitted withinthe wide' corrugations'of L, as 'shown in Figs` t and 5.' Theshort bolts N hold D?, Land YM towhen` M is worn out. Rivets 'or welding may 'be used instead Vof bolts. When two side' plates like the Yone shown in Figs. 3 s and 5 are 'assembled together with spacers like@ and splintslike B, and in the'manfner illustrated by the side plates in Figs. l and 2,:thecorrugations of the backing L'neces sarilyextend Vtransversely of the directionV of /the `lengths of said spacers C. The cor-jvbecauseit has two inner faces meeting at v gether and permit renewing the facing M rugationsT therefore act as'ribs or' beams ex- Y tendingin thejsame direction with the span ofVV the side plates'` and thereby giving them strength 'Pds-'5a' iiange bent inward'at the bott'omfendfQf'Diin'Figs. 3, 4C' and 5. A linkeflange'/P-is'also 'shown'on the bottom of D3. in jFig,l f6. r. ffLjike'fanges are also present (bntlnqt slum'fny"onthe bottom ends of D andrD in: Figs, 'lfand 2;f`iThey, also act asledges to prevent accidental falling of the spacers G int'ogth'e lower-partofya cavitywhengthe-core is; being 'usedat a higher po.- sitopf-abovefthe 'level ofQa 'imp "teilt Ofgdlwllgf c LP.Fi-g.6is` shown a fInodifi 3ati'c nu off side plate comprising :ajrfacingflef thin sheetf maar Me; backing of iebrfragated sheet iis metal L, an extension D3 and the reinforcin strap Q, all fastened together by the bolts in the same manner as the parts A, D and Q at the left of Fig. l. It is preferable that the bolts J conform to square holes for a slight depth under their heads, so that they Will not be turned with their nuts when renewing M.

VV-hat I claim is l. A core mold for forming a cavity and comprising a pair of side plates, the largest molding face of one being parallel to the largest molding face of the other, a spacer for holding said plates apart and adapted for disengagement While the core conforms in and With said cavity, and an angular shaped splint adapted to cover the space between upright edges of said side plates and to overlap them to a substantial distance each side of said space, part of the inner surface of said splint constituting part of the inner surface of the core and extending in two planes each at an obtuse angle to the largest exterior face of one of said side plates.

2. A core mold comprising a pair of side plates and a spacing member for holding them apart, each of said side plates having a sheetmetal extension the inner surface of which being disposed nearer to the exterior upright face of the side plate than to the largest inner upright face of the same said plate, and adapted to bear against the spacing member and thus maintain the last said face at a shorter distance from the other side plate than a distance equal to the Width of the spacing member measured in a direc- .tion substantially perpendicular to the planes of the said upright faces, and thus adapting the core to form a substantially narrow cavity.

3. A core mold comprising a pair of side plates and a pair of spacers for holding them apart, each of said spacers having a bearing edge adapted to prevent movement of one of said plates toward the other, said bearing edge being substantially thin and extending in an upright position When the core is set, the said spacer also having a bearing face Which, When the core is set, bears against-the other spacer in said pair, and has an upright edge disposed in substantially the same plane Which contains both the said thin edge and the like thin edge of the other spacer.

4. A core mold comprising a pair of side plates and a pair of spacers for holding them apart, each of said spacers having a bearing edge adapted to prevent movement of one of said plates toward the other, said bearingv edge being substantially thin and extending in an upright position When the core is set, the said spacer also having a bearing face Which, when the core is set, bears against the other spacer in said pair, and has an upright edge disposed in substantially the same plane which contains both the said thin edge and the like, thin edge of the other spacer, a flexible tie hold ing the spacers in position and passing through said spacers.

5. A core mold comprising a pair of side plates and a pair of spacers for holding them apart, each of said spacers having a bearing edge adapted to prevent movement of one of said plates toward the other, said bearing edge being substantially thin and extending in an upright position When the vcore is set, the said spacer also having a bearing face which, When the core is set, bears against the other spacer in said pair, and has an upright edge disposed in substantially the same plane Which contains both the said thin edge and the like thin edge of the other spacer, there being means for holding said spacers in position.

6. A core mold comprising a pair of side plates and a-pair of spacers for holding them apart, each of said spacers having a bearing edge adapted to prevent movement of one of said plates toward the other, said bearing edge being substantially thin and extending in an upright position When the core is set, the said spacer also having a bearing face which, When the core is set, bears against the other spacer in said pair, and has an upright edge disposed in substantially the4 same plane Which contains both the said thin edge and the like thin edge of the other spacer, and being disposed nearer to the center of the core than any other edge of said bearing face.

In Witness Whereof, I have hereunto signed my name in the presence of two subscribing Witnesses.

ROWLAND T. WALES.

Witnesses:

CHAs. LYON RUSSELL, THOMAS F. WALLACE.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. G. 

